ANC Active Noise Reduction TechnologyANC Active Noise Reduction Technology can provide excellent noise reduction performance in various environments. Whether you are in noisy environments such as subways, buses or planes, its powerful noise reduction function can bring you an immersive and perfect experience;Long endurance designcharging time is about 2h, which can reach about 50h long endurance. When the headset is out of power, the attached audio cable can be used to continue listening to excellent high-resolution audio;Bluetooth 5.4 Intelligent TechnologyThis earphone adopts a new intelligent low-power 5.4 Bluetooth chip design, which saves more electricity, has faster transmission speed, and has a delay as low as 0.04s delay range that human ears cannot perceive. Only when sound and picture are synchronized can you be immersive, listen to body position identification, stereo sound effect, and help you easily defeat the enemy in the game;Portable carrying-lightweight designfree folding, 6000 tensile test, suitable for different head types, lightweight ear-to-ear design, comfortable without ear-to-ear clamping, portable folding storage and carrying, travel without worry;Built-in strong 40mm drive unitspeaker frequency response range of 20Hz-20000Hz, which can present high and low levels of dynamic stereo sound and high resolution music. This earphone is suitable for all iphone and Android systems, and is also a beautiful product shared by your relatives and friends